1/*
2 *  Copyright (C) 2009-2012 Gabor Juhos <juhosg@openwrt.org>
3 *
4 *  This program is free software; you can redistribute it and/or modify it
5 *  under the terms of the GNU General Public License version 2 as published
6 *  by the Free Software Foundation.
7 */
8
9#include <linux/init.h>
10#include <linux/spi/spi.h>
11#include <linux/spi/flash.h>
12#include <linux/mtd/mtd.h>
13#include <linux/mtd/partitions.h>
14#include <linux/mtd/concat.h>
15
16#include "dev-spi.h"
17#include "dev-m25p80.h"
18
19static struct ath79_spi_controller_data ath79_spi0_cdata =
20{
21	.cs_type = ATH79_SPI_CS_TYPE_INTERNAL,
22	.cs_line = 0,
23};
24
25static struct ath79_spi_controller_data ath79_spi1_cdata =
26{
27	.cs_type = ATH79_SPI_CS_TYPE_INTERNAL,
28	.cs_line = 1,
29};
30
31static struct spi_board_info ath79_spi_info[] = {
32	{
33		.bus_num	= 0,
34		.chip_select	= 0,
35		.max_speed_hz	= 25000000,
36		.modalias	= "m25p80",
37		.controller_data = &ath79_spi0_cdata,
38	},
39	{
40		.bus_num	= 0,
41		.chip_select	= 1,
42		.max_speed_hz   = 25000000,
43		.modalias	= "m25p80",
44		.controller_data = &ath79_spi1_cdata,
45	}
46};
47
48struct ath79_spi_platform_data ath79_spi_data;
49
50void ath79_init_m25p80_pdata(struct flash_platform_data *pdata)
51{
52	ath79_spi_data.bus_num = 0;
53	ath79_spi_data.num_chipselect = 1;
54	ath79_spi0_cdata.is_flash = true;
55	ath79_spi_info[0].platform_data = pdata;
56}
57
58void __init ath79_register_m25p80(struct flash_platform_data *pdata)
59{
60	ath79_init_m25p80_pdata(pdata);
61	ath79_register_spi(&ath79_spi_data, ath79_spi_info, 1);
62}
63
64static struct flash_platform_data *multi_pdata;
65
66static struct mtd_info *concat_devs[2] = { NULL, NULL };
67static struct work_struct mtd_concat_work;
68
69static void mtd_concat_add_work(struct work_struct *work)
70{
71	struct mtd_info *mtd;
72
73	mtd = mtd_concat_create(concat_devs, ARRAY_SIZE(concat_devs), "flash");
74
75	mtd_device_register(mtd, multi_pdata->parts, multi_pdata->nr_parts);
76}
77
78static void mtd_concat_add(struct mtd_info *mtd)
79{
80	static bool registered = false;
81
82	if (registered)
83		return;
84
85	if (!strcmp(mtd->name, "spi0.0"))
86		concat_devs[0] = mtd;
87	else if (!strcmp(mtd->name, "spi0.1"))
88		concat_devs[1] = mtd;
89	else
90		return;
91
92	if (!concat_devs[0] || !concat_devs[1])
93		return;
94
95	registered = true;
96	INIT_WORK(&mtd_concat_work, mtd_concat_add_work);
97	schedule_work(&mtd_concat_work);
98}
99
100static void mtd_concat_remove(struct mtd_info *mtd)
101{
102}
103
104static void add_mtd_concat_notifier(void)
105{
106	static struct mtd_notifier not = {
107		.add = mtd_concat_add,
108		.remove = mtd_concat_remove,
109	};
110
111	register_mtd_user(&not);
112}
113
114
115void __init ath79_register_m25p80_multi(struct flash_platform_data *pdata)
116{
117	multi_pdata = pdata;
118	add_mtd_concat_notifier();
119	ath79_spi_data.bus_num = 0;
120	ath79_spi_data.num_chipselect = 2;
121	ath79_register_spi(&ath79_spi_data, ath79_spi_info, 2);
122}
123